This problem is intended to get children to look really hard at something they will see many times in the next few months.
Use your mouse to move the red and green parts of this disc. Can you make images which show the turnings described?
The red ring is inside the blue ring in this picture. Can you rearrange the rings in different ways? Perhaps you can overlap them or put one outside another?
If you split the square into these two pieces, it is possible to fit the pieces together again to make a new shape. How many new shapes can you make?